onlyblues

摘要： [COCI2021-2022#6] Zemljište 题目描述 有一块地，大小为 $r \times s$，$\rm Matej$ 想买下它。这块地每个 $1\times1$ 的正方形都有不同的价格。 设一片非空子矩阵价格总和为 $m$，则这片子矩阵的权值为 $|m-a|+|m-b|$，您需要找到 阅读全文

摘要： D. Professor Higashikata Josuke is tired of his peaceful life in Morioh. Following in his nephew Jotaro's footsteps, he decides to study hard and beco 阅读全文

摘要： D. Monocarp and the Set Monocarp has $n$ numbers $1, 2, \dots, n$ and a set (initially empty). He adds his numbers to this set $n$ times in some order 阅读全文

摘要： Count of Sub-Multisets With Bounded Sum You are given a 0-indexed array nums of non-negative integers, and two integers l and r. Return the count of s 阅读全文

摘要： G. Anya and the Mysterious String Anya received a string $s$ of length $n$ brought from Rome. The string $s$ consists of lowercase Latin letters and a 阅读全文

摘要： C. Decreasing String Recall that string $a$ is lexicographically smaller than string $b$ if $a$ is a prefix of $b$ (and $a \ne b$), or there exists an 阅读全文

摘要： G. ABBC or BACB You are given a string $s$ made up of characters $\texttt{A}$ and $\texttt{B}$. Initially you have no coins. You can perform two types 阅读全文

摘要： C. Card Game There are $n$ cards stacked in a deck. Initially, $a_{i}$ is written on the $i$-th card from the top. The value written on a card does no 阅读全文

摘要： D. Sum of XOR Functions You are given an array $a$ of length $n$ consisting of non-negative integers. You have to calculate the value of $\sum_{l=1}^{ 阅读全文

摘要： D. Effects of Anti Pimples Chaneka has an array $[a_1,a_2,\ldots,a_n]$. Initially, all elements are white. Chaneka will choose one or more different i 阅读全文